Another thing to freeze
The banana experiment was successful ... yes, you can freeze a banana in its skin! At first I thought it didn't work because the skin turned completely black and generally unappealing, but the inside fruity part was fine. It was of course harder to peel since it was as hard as a rock, so I had to cut it in half and then make a notch in the skin.

Of course, you could also just mash up the bananas, add a little lemon juice (to prevent darkening), and pack up for the freezer.